* {
    margin: 0;
    padding: 0;
}
.activity{
    background-color: #eee;
    border-radius: 20px;
}
.activity_title{
    width: 100%;
    margin-top: 14px;
    margin-left: 20px;
    font-weight: bold;
    font-size: 30px;
}
.activity_ul{
    list-style:disc;
}
.activity_li{
    padding-top: 20px;
    line-height: 40px;
}
.activity_list{
    margin-left: -20px;
}
.activity-list-mian{
    color: gray;
}
.activity-list-mian a button{
    font-size: 10px;
    float: right;
}
.activity-list-title{
    font-size: 20px;
}
.activity-a{
    color: dodgerblue;
}
.activity_ul a{
    text-decoration: none;
}